Anti-clamping and anti-supporting-pressing structure for well drilling

The utility model relates to an anti-jamming and anti-supporting-pressing structure for well drilling, which comprises a plurality of drill rod sections or drill collars which are connected in a matched manner and are connected through joint threads in a matched manner, and further comprises anti-jamming resistance reducers arranged among the drill rod sections or the drill collars, the anti-jamming drag reducer is in a stepped shaft shape, a shearing block for shearing left and right is arranged at the step, the shearing block is provided with a shearing blade, and an included angle is formedbetween the shearing blade and the axis of the anti-jamming drag reducer; and balls for reducing friction are arranged on the large-diameter cylindrical surface of the anti-blocking drag reducer. Thehorizontal well drilling tool has the advantages that the situation that the drilling tool is stuck due to chipping caused by collapse of the well wall can be effectively avoided, and the problem that drilling pressure cannot